CN111877163A

CN111877163A - Reaming seam construction die pasting process for hollow slab beam

Info

Publication number: CN111877163A
Application number: CN202010619823.8A
Authority: CN
Inventors: 杨旭林
Original assignee: CCCC First Harbor Engineering Co Ltd; No 5 Engineering Co Ltd of CCCC First Harbor Engineering Co Ltd
Current assignee: CCCC First Harbor Engineering Co Ltd; No 5 Engineering Co Ltd of CCCC First Harbor Engineering Co Ltd
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2020-11-03

Abstract

The invention discloses a reaming seam construction die attaching process for a hollow slab beam, which comprises the following steps of: 1) after the hollow plate girder is transported to the site, an extruded sheet or a rigid plastic foam board or a foaming double-sided adhesive which is 2cm high and 1.5cm wide (0.5 cm wider than the hinge joint) and is as long as the plate girder is adhered to the bottom of the plate girder, and the bottom of the extruded sheet or the rigid plastic foam board or the foaming double-sided adhesive is flush and straight with the bottom surface of the plate girder; 2) when the hollow slab beam is erected, erecting adjacent beam plates to a designed position, clamping an extruded sheet or a rigid plastic foam sheet or a foaming double faced adhesive tape at the bottom of the slab beam, checking the tightness of the template after erection is finished, and if gaps exist, tightly extruding the gaps; 3) and pouring hinge joint concrete. The reaming seam construction die attaching process for the hollow slab beam has the advantages of simple template installation, less labor input and material input, cost saving and no need of die removal.

Description

Reaming seam construction die pasting process for hollow slab beam

Technical Field

The invention relates to a reaming seam construction die attaching process for a hollow slab beam.

Background

As shown in fig. 1 and 2, in the hinge joint construction of the hollow slab beams 1, a mold hanging process is conventionally adopted, the template can be made of bamboo plywood or PVC pipes 2, the hinge joint template is hung by using iron wires 3, the upper parts of the iron wires 3 are fixed on the steel pipes, the steel pipes are erected on the top surfaces of two adjacent hollow slab beams 1, and the template is reinforced by screwing the iron wires 3 tightly. When the template is dismantled, the bottom of the beam plate is dismantled manually by using a truck-mounted crane (with a high-altitude hanging basket), and the pointing treatment is carried out after the template is dismantled.

The mould hanging process has the following defects: (1) the installation of the template is time consuming and laborious. (2) The labor is invested and the materials are more. (3) The form removal needs to be carried out at the bottom of the beam, the construction time is long, the danger is high, and the construction difficulty is high. (4) The beam bottom pointing is needed after the form removal, the property of the beam bottom pointing is the same as that of the form removal plate, the beam bottom pointing needs to be operated by a lifter in cooperation with manpower, and the construction difficulty and the safety risk are higher.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the reaming seam construction die attaching process for the hollow slab beam, which effectively improves the construction efficiency and reduces the construction difficulty and the construction risk.

In order to achieve the purpose, the invention adopts a hinge joint construction die-attaching process for a hollow slab beam, which comprises the following steps:

1) after the hollow plate girder is transported to the site, an extruded sheet, a rigid plastic foam board or a foaming double-sided adhesive which is 2cm high, 1.5cm wide and equal in length to the plate girder is adhered to the bottom of the plate girder, and the bottom of the extruded sheet, the rigid plastic foam board or the foaming double-sided adhesive is flush and straight with the bottom surface of the plate girder;

2) when the hollow slab beam is erected, erecting adjacent beam plates to a designed position, clamping an extruded sheet or a rigid plastic foam sheet or a foaming double faced adhesive tape at the bottom of the slab beam, checking the tightness of the template after erection is finished, and if gaps exist, tightly extruding the gaps;

3) and pouring hinge joint concrete.

As an improvement, the extruded sheet is a sheet material which is formed by extruding polystyrene resin and additives and has a continuous uniform surface layer and a closed-cell honeycomb structure.

As an improvement, the extruded sheet is adhered to the hollow slab beam by waterproof strong glue.

As an improvement, in the step 2), firstly erecting the side hollow plate beam, after the side plate beam is erected, plugging a gap between the pier top or the abutment top and the bottom of the side plate beam by using a wood wedge, plugging the wood wedges into two sides of the plate beam, and arranging a temporary support on a web plate outside the plate beam by using a steel pipe or a thick steel bar;

when the second plate beam is erected, the transverse distance between the second plate beam and the first plate beam is controlled to be 2-5cm in the beam falling process, when the second plate beam is suspended for 1-2cm, the second plate beam is leaned inwards, and after the transverse position of the second plate beam meets the design requirement, the final beam falling is carried out.

Compared with the prior art, the reaming seam construction die attaching process for the hollow slab beam has the advantages of simple template installation, less labor input and material input, cost saving and no need of die removal.

Drawings

FIG. 1 is a schematic view illustrating the connection of two adjacent hollow plate beams;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic structural view of the present invention;

in the figure: 1. the method comprises the following steps of hollow plate girder, 2 PVC pipe, 3 iron wire, 4 extruded sheet, 5 hinge joint.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.

As shown in fig. 3, a hinge joint construction die-attaching process for a hollow slab beam comprises the following steps:

1) after the hollow slab beam 1 is transported to the site, the extruded sheet 4 or the hard plastic foam board or the foaming double-sided adhesive which is 2cm high, 1.5cm wide and equal in length to the slab beam is adhered to the bottom of the slab beam, the bottom of the extruded sheet 4 or the hard plastic foam board or the foaming double-sided adhesive is flush and straight with the bottom surface of the slab beam, the surface of the concrete at the adhered position is cleaned before adhesion, the cleaning and dust-free are required, and the adhesion is firm without protrusion or depression;

2) when the hollow slab beam 1 is erected, erecting adjacent beam plates to a set position, clamping an extruded sheet 4 or a rigid plastic foam board or a foaming double-sided adhesive tape at the bottom of the slab beam, checking the tightness of the template after erection is finished, cutting the extruded sheet 4 or the rigid plastic foam board or the foaming double-sided adhesive tape with a proper size if a gap exists, and extruding and reaming the gap 5;

3) and pouring hinge joint concrete, wherein after pouring is finished, the template does not need to be detached.

As a modification of the embodiment, the extruded sheet 4 is a sheet material with a continuous uniform surface layer and a closed-cell honeycomb structure, which is formed by extrusion processing of polystyrene resin and additives.

As a modification of the embodiment, the extruded sheet 4 is adhered to the hollow slab beam 1 by waterproof strong glue.

As an improvement of the embodiment, in the step 2), firstly, erecting the side hollow plate beam 1, after the side plate beam is erected, plugging a gap between the pier top or the abutment top and the bottom of the side plate beam by using a wood wedge, plugging the wood wedge into both sides of the plate beam, and arranging a temporary support on a web plate outside the plate beam by using a steel pipe or a thick steel bar;

The template of the die attaching process of the invention occupies hinge joints of the original mortar part, but occupies little space with the height of only 2cm, and the concrete of the part mainly plays a role in blocking the joints instead of playing a role in connecting two hollow plate beams, thereby having no influence on the quality, stress and the like of the beam plates.

The template reinforcement of the die attaching process is mainly realized by clamping two adjacent beam plates, and the width of a gap is larger than a designed value possibly due to factors such as beam plate concrete construction deviation, installation deviation and the like in the actual construction process, so that the gap still exists after the template is installed. The beam and slab dimensions are carefully inspected during construction and are reviewed and summarized during first-part construction, and the width of the extruded slab can be adjusted as the case may be.

The extruded sheet adopted by the invention has a color different from that of concrete generally, the color is not uniform after the extruded sheet is installed, and the color of the extruded sheet can be close to that of the concrete by a mode of brushing a coloring agent.

The die attaching process of the invention does not need to remove the die plate, because the extruded sheet can fall off even if the time is long, but the safe risk does not exist, the removal is not necessary, and the falling possibility is very low.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The reaming seam construction die attaching process for the hollow slab beam is characterized by comprising the following steps of:

3) and pouring hinge joint concrete.

2. The reaming construction molding process for the hollow slab beam as claimed in claim 1, wherein the extruded sheet is a sheet material with a continuous uniform surface layer and a closed-cell honeycomb structure, and is formed by extruding polystyrene resin and additives.

3. The reaming construction molding process for the hollow slab beam as claimed in claim 2, wherein the extruded sheet is adhered to the hollow slab beam by waterproof strong glue.

4. The reaming construction die attaching process for the hollow slab beam as claimed in claim 1, wherein the hollow slab beam at the side is erected in step 2), after the erection of the slab beam at the side is completed, a gap between the pier top or the abutment top and the bottom of the slab beam at the side is plugged by a wood wedge, the wood wedges are plugged into both sides of the slab beam, and a temporary support is arranged on a web plate at the outer side of the slab beam by using a steel pipe or a thick steel bar;